12123131017 has 2 divisors, whose sum is σ = 12123131018. Its totient is φ = 12123131016.

The previous prime is 12123131011. The next prime is 12123131117. The reversal of 12123131017 is 71013132121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11963765641 + 159365376 = 109379^2 + 12624^2 .

It is a cyclic number.

It is not a de Polignac number, because 12123131017 - 2⁷ = 12123130889 is a prime.

It is not a weakly prime, because it can be changed into another prime (12123131011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061565508 + 6061565509.

It is an arithmetic number, because the mean of its divisors is an integer number (6061565509).

Almost surely, 2^12123131017 is an apocalyptic number.

It is an amenable number.

12123131017 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123131017 is an equidigital number, since it uses as much as digits as its factorization.

12123131017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

Adding to 12123131017 its reverse (71013132121), we get a palindrome (83136263138).

The spelling of 12123131017 in words is "twelve billion, one hundred twenty-three million, one hundred thirty-one thousand, seventeen".